Telegraph system



P, M. RAINEY AND A D. DOWD.

TELEGRAPH SYSTEM.

APPLICATION FILED IUNE 22, I917.

Patented May 24, 1921.

/ A? Vanna/J:

- Pza/ /'7, fIa/ney Andrew 1?. 15 0 war ATENT FFlt'IilEh RAIN 6i? GLENRIDGE, AND ANDREW ID. DOWD, 0F HOIBUKEH, 1i!- EV] J E -lllll'if,ASSEGHGEQ E0 WESTERN ELECTRIC COMPANY, INCQRPQRATED, QF NEW "ESE/E, N YA. CURPORILTIQN OF NEW YORK.

TEI'FLiEGRiWH SYSTEM.

Specification of Letters Patent.

Patented May 245i, 192i llppiicaticn filed $11112 191?. Serial R'o.176,390.

To all whom all may con-8mm Be it known that 'W' PAUL M. Holmes andANDREW D. Down, citizens of the llnited States, residing at Glen Ridge,in the county oi Essex and Eitate of New Jersey, and at liloholten, inthe county oi Hudson and State of New Jersey, respec tively, haveinventedcertain new and use ful Improvements in l.elegra1.ih Systems, ofwhich the toflowing a full, clear, concise, and exact description.

T his invention relates to telegraph systems, and more particularly toprlntlng telegraph systems adapted for either manual or automatictransmission.

The principal object 01 this invention is the provision. of meanswhereby groups of selecting current impulses may he formed and storedready for transmission while the precedinggroup oi selecting currentimpulses are being sent to line, thereby making it possible to set upCOID DllHLtROHS of 1mpulses in rapid succession without loss ori'nutilation of any impulse.

A further ohiect is the provision of means whereby a plurality of onrent distributors, located at widely separated stations, may hecausi't'cl to maintain the proper phase relation. without employingcomplicated and expensive apparatus For the accomplishment of the aboveobjects, the invention contemplates the em- 'iloyment of:current-control means cooperating with a distrilmter to form currentimpulses for the line. The current-control means may comprise anautomatic transmitter, or av direct kcyhoard transmitter in eludingselecting magnets and control magnets, either of which may cooperatewith rotary sending distrihuier to form characLci-islic groups of lineimpulses. The cireuit connections of the keyboard transmitter are so arrann'ed that two or more keys may be depressed in rapid succession toform groups oi" selecting impulses for the line with out mutilation orloss of any iuipul se,thcrehy providingwhat is called a free keyhoard.Switching means are also provided whereby either oi the current ci'mtrolmeans may he a ociated with the distributor. A rece ngg oistrihuter isalso provided which operzzlcs uwisochronism with the sendingaccompanying drawing in which is dis-- ,closecl one specific embodimentof the 1nvention.

The system of this invention is here shown adapted for use with alive-unit impulse code using two additional impluses, one a startingimpulse which precedes the first signaling impulse and the other arestoring impulse which follows the fifth signaling impulse. Obviously,other codes, sucln'for example, as the Bautlot code con sisting of fivepositive and negative ion pulses, may he used without departing from thespirit of the invention, The system preferably requires but a singleline con doctor with a ground return. The apparatus shown in theaccompanying dr 'ingis that employed at a single motion. .85 is read lyapparent, however, that any number of stations similarly equipped may bein terconnected and one stat-ion may be send ing and all othersreceiving Oran two si1ations may send and receive simultaneously byproviding the usual duplex balance, or two line conductors may heprovided, one for receiving and one for seinrling'. A system of thiskind finds a ready field in press or news distribution Work.

In the accompanying drawing, A and ii are two distributor faces parallelto each other, each face consisting; of two segmented rings. Thedistributor brush arms 10 and 110 are frictionally mounted on aconstantly rotating: shaft 1i which may be driven by any suitable mausfor example, a motor. Each arm carries a brush which is adapted to sweepover its respective distributor face and interconnect the segments ofthe two rings when the brush arm is rel eased as will he l'ieroinafierexplained.

The diqtributer i cooperates with current control one to form currentlmpulsos for n cooperates the line and the distl'ibuter L) Witkselecting mechanism to distribute the effects of current impulses fromthe line to operate a receiving or home recording mechanisl for example,printer A6 40 is represented a keyboard which may be used for seleeti yactuating e piumlity of ouirent centre ling; contacts. T1155; mechanismbe of an euiteble by; e but prefwa'bly 01 the type Gisele in Patent No.1,214,515, dated February 6, 191?.

At the lower left-hand corner of the drmving shown an amtomatic currenteonrollez' 20, controlled by :2 erfomted iepe, 01' Joe like, whichcontroiler may be 01 any suitabie type, for example, that diseiosed. inFrench Patent 351,281.

A multiple switch 60 is provided for e engine from direct keyboard totape mansxmsslon and woe verse. The SWTECh shown in the drawmg" 1s mposition 01 keyboard t 'zmsmission A better understanding; of the s'stem can he obtaineri from e description of the e-leo-- tion of aparticular enemcter and file various operations which take pmoe intransmitting and YfjCOi'dlIllj the necessary im pulses for: epl:senfilng a glven character.

Lei; us assume, for exempie, that the letter FD is to be transmitted bythe keyboard transmiit't 1' P and that the combination and eequenee ofunits required are curremt, no ;1.11'1'(-:171. no current current, 110current. The movable keyboard contacts 101 to 105 inolusive areselectively closed by the keys, While the common keyboard Contact 106 isclosed Whenever enykey is depressed. Now, when the D-key of the keyboard(not shown) is; depressed, the mm'ebie 001mm 101 and 10% are moved intoengagemenfi wim their respective stationery contacts and the (rommozxkeybozn'd oonfiaox 06 also closed. The closing of these contactscompletes ene1;) i"'ng circuits through the corresponding selevilingg'relays 111 and 1M and the oveflap magnet 32 The energizing;- eireuite ofthe seieeted ire iays and overhp magnet may be rnoed from grounded.oattexry through me rifimt-nam? windings of relays 111 and 114 andcontacts 101 and 104 l'esfmc zivelyu in parallel, armature of look-outmagnet 51, armature of keybom'o magnet 30, Winding of (Wm-lap magnetcommon keyboaud eontzmt MR3, to ground. Tviagnet :32 pulls up itsannaiu'res 116 and 11.7 and tnifl'zshes :1 holding: (firwoil, 'fm" itelf, from grounded buttery 7T? m'ruzhilule and front mmhzet there-cm\viuu'ling of m: H 5'12, (sontuot MS. to Noun i. 'L-"hxs cu'omt \1 1h bemain'nined as; long any key oi the keyboard is depressed. 'l'he pulling;12;) 0'5? armature 116 does now; effect on)? epgmmizm at :this *Eime.hen the seleo' actuated ehey'become Packed up, [me to flow of currentfrom grounded on through the hie-hand Flocking W1! the se'iectedi'eiaye, lefehzmd illIJllHtUiGS and. contacts ehereofi through thewinding; of the ko g'iwerd, xtnagnet 5% hack oontee; and 3mm tore NE? oflock-on: magnet 5L fie ground. In addition to locking up the sew-tedelecting relays, current in this eireuia, also the energimtion oi thehmu'd magnet which etfireete fie armature-e 12 6 and 127. The ath'ectionof armature 1% opens the energizing circuit; of the selecting; l'eiu butdoes not effect magnet 52 which Zoe up over an independentoireni. Theat'ilzmiion of: mmumre 12'? establishes 1m energizing; circuit for thesending start: relay 14 which circuit may be firmed from grommet betfiery 13 wil'n iing of reiey L12, armature 12'? and eontacii theroofimovable switch 16 of multiple swiec'r: and lower Contact there 0iholding: pawl 17, brush arm 10, brush 9, segmem' 21 a0 ground. To 21y M;in pulling up its we 3% e5-1fi1ubiishee on energizing; cizeuii; foriolet magnet lFt and, in pulling up erme'm're E22 vemowe betiery fromthe "fine; thereby 0:: ing: 51m fleimmpfmu n of line 4-" If; is to beundwstooei Lid; he lime L will Tammany dosed and Wii; include a. som'eeof emx'en; eo Chet when she line is idle or when n'wssug-e eiga mdsmenot being vs at the 1g relays we mansrmttefi, the Hm: 2* eml ev'zeizionswill be meint." gzized. and will hold their main their "front coma-mete.The

start meg-fiat 18 muses if? we tribute]: brush are: 1U. so ivoe'i; t isivern'litted to rote; {use engagement with the cone shaft 1L to Send tothe line ChdE'ECtel'ifhia impulses as n'o ified by the L'rzmsmifle? llhome New if it is desired to ohizmh :1 record of the mxtgoing meesegaeeomplished by dosing! the that the (listvribufe'z l1 and seleeiin nismHO viii Yespond it? *ffhu zwtuation of the line 1-day 34. A ,7 ming: theswitch 1 .3} dosed, then when we line relay 3% i9; (loone in Thedistributor brush arms 10 and 110 have both been released, and sinceboth are frictionally mounted on the same rotating shaft, they willtravel at approximatelythe same speed. The distributing faces ofdistributors A and B are so adjusted relative to each other that thebrush 109 will interconnect segments 171, 172, 173, etc., with seg ment131 at the same time the brush 9 interconnects segments 71, 72, 73, etc,respectively, with the segment 31, As the brush 9 passes over thesegments of the sending distributer A, the circuit of the line wire isclosed in accordance with the particular selection set up by theselecting relays; that is, since relays 111 and 114 have been actutoprovide the necessary impulses for tie character 1), the line circuitwill be closed while the brush 9 passes over seg ments '71 and 74, andwill. be opened while the brush passes over segments 72, 73 and 75., itwill thus be seen that the character selections are made simply by.openin and closingathe line circuit as is done in orse operation.

As soon as brush 9 passes oil of segment 70, the circuit for startmagnet 18 is broken,

' thereby permitting holding pawl 17 to fall back and engage the brusharm 10 when it completes a revolution. It will also be observed that assoon as brush 109 passes oil" of segment 170, the holding circuit forrelay 11 1 will be broken and consequentlyarma tures 122 and 132 willfall back. When. ar' mature132 falls back start magnet 118 will bedcnergized and the holding pawl 117 will fall back in' the path oftravel of the brush arm 110, thereby permitting the brush arm to makeonly one revolution until the start magnet 118 is again energized.

"The. instant brush 9 interconnects seg ments 71 and 31, a circuit willbe completed from grounded battery 108, armature 141 of selecting relay111, movable switcln29 and lower contact thereof, segment 71, brush 9,

segment 31, through the winding of line relay 34, to ground at a distantstation. Current in this circuit will cause the energization of relay 34and may also cause the energization of a corresponding relay at adistantstation, or there may be a number of relays located at as manydifferent stations, each responding to the impulses sent out by thedistributor A.

As hereinbcl'ore mentioned, while brush- 9 travels over segment 71,brush 109 likewise travels over segment .171, and when the line relay 34is energized a circuit is completed from grounded battery 128, windingof selecting magnet 181, segment 171, brush 109, segment 131, armatureand front c mtact thereof, to grouhd. Current through this circuit willcause the energization of the selecting magnet 191 of, the selectingmechanism 80 and cause the selecting mechacter which is beingtransmitted. When the brush 9 passes off of segment 71, the circuitthrough the line relay 34 will be broken and the armature 35 will fallback against its back contact. Now as brush 9 passes over segments 72and,7 3, no current will be sent to line, as the selecting relays 112and 113 have not been energized to connect battery to the respectivesegments of the distributor, and consequently the line relay 3 1 will beunaffected. Likewise, the selecting magnets I 182 and 183 of theselecting mechanism will not be energized when the brush 109 sweeps'oversegments 172 and 173, since the circuits through the respective magnetswill be opened at the. front contact of armature 35. However, when brush9 interconnects segments 74 and 31, a circuit will be completed fromgrounded battery 108, armature 144 of selecting relay 114, movableswitch 37 and lower contact thereof, segment 74,, brush 9, segment 31,line relay 34, line L to ground at a distant station. This will causerelay 34 to attract its armature 35 and since brush 109 is nowpassingover segment 174,

the selecting magnet 184 will be actuated in the same manner asselecting magnet 181 hereinbe'fore mentioned and described. The brush 9,in passing over segment 75 will not impress current on the line, sincethe selecting relay 115 has not been energized to connect battery tothat segment; consequently. the line relay 34 will not be actuated andtherefore the selecting magnet 185 will not be energized when brush 109sweeps over segment 175. hen brush 109 interconnects segments 121 and176, current will flow from grounded battery 11.5, segn'ient 121,

brush 109, segment 176 to a recording or printlng mechanism to record orprint the selected character D. The printing apparatus may be of anysuitable type, such,

for example, as that disclosed in Patent 1,128,422, dated February 16,1915.

After brush 109 passes of? of scgn'ient 176, it will continue to traveluntil engaged by the holding pawl 117 and will be held by that pawluntil the sending start relay 14 is again energized as hereinbeforedescribed.

When brush 9 engages segment 7 0, current will flow from groundedbattery 77, through the winding of stop relay 26, seg ment 76, brush 9,segment 21, to ground,

thereby causing stop relay 26 to attract its armatures 25 and 78. Theattraction of armature 78 completes a circuit from grounded battery 79,armature 78 and front contact brush 9 interconnects segments and 21 andthe closing of contac 23 provides hattcry tor the various sendingstations along the line L.

The actuation of the lock-out magnet 51 performs two functions. firstthe attraction of armature 178 opens the locking circuit of the keyboardmagnet and selecting relays and also establishes a locking circuit formagnet 51. prox'ided magnet 52 has not been decnergizcd; secondly, thiattraction of armature 125 prevents the premature operation of theselecting relays which are to be selected for the next charactercombination.

Should any. key lever be held depressed, magnet 52 will continue to belocked up; consequently, the lock-out magnet 51 will be locked up bycurrent from grounded battery 179, armature 116 of magnet 52, lockingwinding of magnet 51,.armature 178 and front contact thereof to ground.Unless this provision were made. the same. group of selecting impulseswould be impressed upon the line repeatedly so long as a particular keylever is held down.

It ill also be observed that it a second key is depressed before thegroup of impulses set up by the actuation of the first key has beenwiped oil by the distributcr brush, a new selection cannot be set up forthe reason that the energizing circuits of I the selecting relays areopen at armature 126 of keyboard relay 50, but the second selection willnot be lost provided the second key is held depressed until the lock-outrelay 51 falls off and closes the. hack contact ot' armature 12:").Relay 2(5 falls off as soon as brush 5) passes oli of segment 76, andcauses the decncrgization of lock-out relay 51. This arrangement allowsthe operator considerable freedom in manipulat ing the keys. and alsomakes it possible to attain a somewhat highcr speed. The operation ofthe receiving distributcr ll and the selecting mechanism Ht) when usedfor producing a copy of the outgoing message has been described. but itis to be undcrstood that the functioning of the apparatus has been thusdescribed for the sake of simplicity and that the apparatus may be usedto record the cllccts oi impulses received over 3 orenz's the line Lfrom a distant station, and in tact would gencrz ll v be so used.

so far we have considered the operation and cooperation of the rotarydistributors, the selecting mechanism and the direct key hoard currentcontrol means. it the let's hand side (it the drawing is shown anautomatic current controller 2() and a multiple switch 60 for connectingthe controller to the distribulcr segments and disconnect ing thecontroller l0 therefrom. The antoniatic current controller comprises aphi ralit v of movable contacts 1 to :"i inclusive which may beselectively actuated by means of a perforated tape or the like to engagethe bus-bar T which is connected to a grouiulcd source of battery 8.When using the current controller 20. the multiple switch (30 must bethrown to bring the niovable contacts thereof into engagement with theupper stationary contacts. and the switch 19 must, he closed. Theclosure of switch- 19 completes a circuit from grounded bat tcry 13,through the energizing winding of sending start relay ll. switch 19,contact 12., movable switch 16 and upper contact thereof, holding pawl13', brush arm 10. brush 9. segment 21 to ground. Cnrrent through thiscircuit causes relay i l to attract its armaturcs 32 and 22, whichcontrol the distributers A and. l, respectivcly as hereinbetorc.described.

So far as the functioning of the distrih utcrs and selecting mechanisi'nis concerned, tape. transmission does not diller from direct keyboardtransmission. and therefore the operation of the sending and rect'ving aparatus will not be further described in connection with the tapetrai'ismission except to state that when stop magnet 26 is actu ated,due to the brush 9 interconnecting segments 2.1. and 76, ,anei'iergizing circuit will be completed for the tape feeding inagnet 852,from grounded battery 79, armature 73 and front contact thereof, movableswitch 8L and upper contact. winding of magnet .olgeach impulse may beutilized to operate.

the selecting mechanism. It the brushes at the receiving stations travelin synclu'ouisni with the brush at the sendin station then the smallportion oi each signal inipu which is utilized will be taken from ccntcrand coirioucntly that portion. olithe impulse which is utilized will beprat l tree from mutilation due to inductive i1 actuating the movablecontacts foresee. Should the brushes not rotate in syuchronism, thatportion of each signal which is utilized to operate a selecting meg uctwill be taken from some part of the signal impulses on either side, ofits center sic will be seen that considerable variu u in speed isg'iermissible before an impulse is dropgilcd.

-Wlist'is claimed is:

1. ln s printing telegraph syst m wherein the characters are representeby permutetious impulses, a. group of circuit controlcoritects, meansfor selectively actuating said contacts, a main line, it currentdistribrc tor for connecting said contacts sequentially with said lineand tending normally ito rotote, and rhesus controlled by saiddistributer whereby said group of coiitacts may be actuated in rapidsuccession Without loss'or uu'itiletion of impulses.

2, In :1. printing telegraph system con1- prising :1 current distributertending normally to rotate, at main line, a group of cir-- cuitcontrolliiig contacts, s group oi selecting relays controlled by saidcontacts and cooperating with the distributor to form. current impulsesfor the line, a magnet con trolled by said relays for releasing thedisbu'ter, and means controlled by the distributor for preventing lossof impulses when. said group of contacts is actuated in rapidsuccession.

3. ln a printing telegraph system compris' 1,9; e clistributer tendingnormally to r0- tute, a plurality of keys, :1 group of contacts sell .1rely actuated by each of said lroys, a plurality of selecting relayscontrolled by said contacts, a keyboard magnet energized upon actuationoi. any selecting relay to release the said distributor, and meanscontrolled by said distributor to cause the de cuergrizution of saidkeyboard magnet.

l lo a. printing telegraph system com prising a. distributor tendingnormally to ro tzitc, :1. main line, :1 plurality of keys, a group ofi-cuitacts selectively actuated by each of said keys, a 'ilurzility ofselecting relays controlled by said contacts and arranged to co operatewith said distributer to form current impulses for the line, a keyboardmagnet energized upon actuation of any selecting relay to release thesaid distributor, and s loch-out magnet controlled by said distributorto cause the deilnergizz-ition of said keyhoard rruigriet.

5, lo twisting telegraph system com prising o cistributcr tendingmanually to romain line, :1 plurality of keyboard circult controlllugcontacts. a plurality of selooting relays controlled by said contactsand :nrreugml to cooperate "with soul dis utcr to form current impulsesthe I energizing; :md loclriop; windings for s. relays, a keyboardmagnet in series with tributcr to bring said distriboter f0 cohuectirigsaid contacts in turn with, said line end tending normally to rotate,independent of said current i log; for controlllugthe rotw saiddiM-riluilier, s l:

coutr tion 0. xy roi'zhected in series W maiuline and responsive to allline current impulses, amid a home record irrechenism comprising 17!.plurality of operating magnets and a. rotary distributor controlled bysaid relay,

7. in s printing telegraph system. u. liue circuit, source of currentnormally in therewith, meet or selectable contacts associated with saidsourc o -f urrent. means for connecting said contacts to sold source, adistributor mechanism associated with said contacts, and a relaycontrolled by said distributor iuecl'iziiiism "For initially c oningsaid liue circuit and for releasing said disselectuble contacts intoseries relation with the line.

8. In a printinglelegzruph system comprising 2i current distriluitcr, aplurality oi keyboard circuit controlling contacts, e plurality ofselecting; relays controlled by said contacts and arranged to cooperatewith said distributer to for A, current impulses for the line,energizing and locking: windiugrs for said selecting relays, an overlapimuruct in series with said energizing windings and adopted to beenergized when any lrcy is depressed, at lock-out magnet controlled bysaid distributor, and a holding circuit for sold. lock-out magnetcontrolled by said overlap imlgiiet.

9. In a printing telegraph system comprising: a distributor, :1lllZl-lll line, a plurality oi keyboard circuit controlling contacts. a.plurality of selecting; relays controlled by said contacts andcooperating with said distributor to form characteristic groups orcurrent imprdses for the line, and means controlled by sold keyboardcontacts and said distributor whereby two or more keys may be depressedin rapid succession without loss or mutilation of the impulses.

10. lo printing telegraph system, the combination of a, main line, atransmitting currentdistributor, 2i plurality of current control meansarranged to cooperate with said distributor to Form groups of currentimpulses for the line, it main line relay con-- uccte in series with theline and responsive to all line current impulses, s receiving; cur

ed by suirl main line echsuisin associated (listributer to dishe lineimpulses to u niechunisni.

ming telegraph system, the main line, main-line so cu'rccntiilistirihutec, o UZitE'Ql means arranged l(l it inluitei' to form aline, switching one of the control 3; W31, rout oistiioui Ye 1y, and

is t

groups of 1' inem'is for line relay, and. home :iutoil with the lust 16oit ll i illlll actuated in reto impi'ilscs transmitted by the fiisfmentioned distributor. 'ln s witl'i, s ic oi: lectable contacts arrangedto close to o; said lino circuitdepending upon their so ted ornon-selected con- 253 i'jlition :lectivcly operating sold contuc ,utci.uieohsi'ilsni for suc cessively lu'lnginu suitl contacts into seriesrelation with the lingo teluy in circuit with said line csponsi'i'e tothe opening: and closto lug thereof, a local circuit including 21seconil ilis'triliiuter under the control of said ssicl line responsiveto each opening and closing thereof, a local circuit incliuling a,

second distributor under the control of said relay, encl meansresponding to on initial.

operation of-suicl relay fol initiating the operation of: said seconddistributor.

14-. In :1 printing telegraph system, a line circuit, a source ofcurrent normallyin series therewith, a set of selectable relays,contacts therefor, means for selectively operat:

ing said relays to connect said contacts to said source of current, adistributor mechanism connected to said contacts, and means controlledby saicl relays for initially opening the line circuit and for effectingthe release of the distributor mechanism to con nect said selectedcontacts to the line.

15, In a printing telegraph system, a line circuit, a source of currentnormally connectecl therein, a. current impulse distributor normallytending to rotate, a set of selectable contacts connected thereto,relays for selectively closing said contacts, and means controlled bythe operation of suicl contacts for releasing theseid distributor toclose and to open the line circuit sequentially as determined by theposition of said. selectable contacts.

1. In a. printing telegraph system, a line circuit, a source of currentnormally in cluclecl therein, a distributor mechanismcomprisingconducting segments, a plurality of local circuits connectedto said seqments,

circuit-closing mechanism for selectively connecting current to saidlocal circuits, unil means controlled by soul 'ClICUllJ-(flOS'lI1Imechanism for nut-lolly opening the line circuit. and for initiating theoperation of said distributor mechanism.

In Witness whereof. we hereunto subscribe our names this th clay of JuneA. D, 1917 PAUL M. AINE Y.

ANDREW in. Down.

